CHINT NB8-125 Moulded Case Circuit Breaker

CHINT NB8-125 Moulded Case Circuit Breaker,
is engineere for reliable protection and isolation in low-voltage distribution systems up to AC 415V/DC 220V and 125A.
It safeguards against overload, short-circuit, and insulation faults in commercial,
residential, and light industrial applications. Built to IEC 60947-2 and GB/T14048.2 standards,
the NB8-125 combines compact size, thermal-magnetic tripping,
and high endurance — ensuring long-term performance and operational safety.

• Function: Overload, short-circuit protection, and isolation
• Standard Compliance: GB/T14048.2, IEC 60947-2
• Certifications: CCC, CE, CB, RoHS
• Rated Current (In): 80A, 100A, 125A
• Rated Voltage (Ue):
  • AC230/240V or DC110V (1P)
  • AC400/415V or DC220V (2P)
  • AC400/415V (3P/4P)
• Rated Frequency: 50/60Hz
• Rated Breaking Capacity (Icu):
  • AC: 6kA (up to 100A), 4kA (at 125A)
  • DC: 5kA
• Rated Service Breaking Capacity (Ics): 7.5kA
• Rated Insulation Voltage (Ui): 630V
• Rated Impulse Withstand Voltage (Uimp): 6kV
• Dielectric Test Voltage: 1,890V at 50Hz (1 min)
• Tripping Characteristics:
  • Curve C: AC (8In ±20%), DC (11In ±20%)
  • Curve D: AC (12In ±20%), DC (17In ±20%)
• Working Principle: Thermal-magnetic
• Poles Available: 1P, 2P, 3P, 4P
• Mechanical Life: 20,000 operations
• Electrical Life: 10,000 operations
• Terminal Connection Type: Cable / Pin-type busbar
• Terminal Size:
  • Min: 25mm²
  • Max: 50mm²
• Tightening Torque: 3.5 N·m
• Strip Length: 14mm
• Reference Temperature: 40°C or 50°C
• Working Temperature: −35°C to +70°C
• Storage Temperature: −35°C to +85°C
• Altitude: ≤2000m
• Flame Retardant Grade: V-0
• Pollution Degree: 3
• Connection Type: From top or bottom
• Protection Degree:
  • Direct Mounting: IP20B
  • Inside Cabinet: IP40B
• Accessories Supported: S9, V9, XF9, XF9J, OVT-1, OUVT-1
• Mounting Type: DIN rail or fixed mounting
• Dimensions (mm):
  • Height: 86
  • Width: 27 (1P), 54 (2P), 81 (3P), 108 (4P)
  • Depth: 76.8